The following maps identify population and employment characteristics within 1/4-mile euclidean buffers of roadway segments in the study corridor. Roadway segments are split into analysis components no longer than 500-feet.
Population and employment data are obtained from the regional travel demand model. Zonal estimates are disaggregated to the building level using two weights: existing land use (with relative land use weight) and building footprint area. Land use weights are documented below.
Disaggreagted population and employment estimates are then summarized to the roadway segment level. A 1/4-mile buffer is generated around each segment and the population and employment of buildings that have their center inside the buffer are summed up. These values are converted to per acre densities by dividing by the number of acres in each buffer. The result is a population and employment density estimate for each roadway segment.
Each land use is assigned a relative weight for both population and employment. These weights are applied in conjunction with building footprint areas in order to disaggregate all population and employment within each TAZ to the building footprint level. The tables below document weights applied. In this table, a value of 0 represents no allocation is made. 3 represents “high”, or 3 times as many
| Land Use Desc. | Relative POP Weight | Relative EMP Weight |
|---|---|---|
| Bays and Estuaries | 0 | 0 |
| Commercial and Services | 0 | 3 |
| Communications | 0 | 0 |
| Disturbed Lands | 0 | 0 |
| Herbaceous | 0 | 0 |
| Industrial | 0 | 2 |
| Institutional | 0 | 2 |
| Lakes | 0 | 0 |
| Mixed Rangeland | 0 | 0 |
| Non-Vegetated Wetlands | 0 | 0 |
| Open Land | 0 | 0 |
| Other Open Lands <Rural> | 0 | 0 |
| Recreational | 0 | 1 |
| Reservoirs | 0 | 0 |
| Residential High Density | 3 | 0 |
| Residential Low Density | 1 | 0 |
| Residential Medium Density | 2 | 0 |
| Sand Other Than Beaches | 0 | 0 |
| Shrub and Brushland | 0 | 0 |
| Slough Waters | 0 | 0 |
| Streams and Waterways | 0 | 0 |
| Transportation | 0 | 0 |
| Upland Coniferous Forests | 0 | 0 |
| Upland Hardwood Forests | 0 | 0 |
| Upland Mixed Forests | 0 | 0 |
| Utilities | 0 | 1 |
| Vegetated Non-Forested Wetlands | 0 | 0 |
| Wetland Hardwood Forests | 0 | 0 |
Map of TAZ Employment Estimates and Building Footprints w/ Land Use
This map shows the control totals (employment estimate by TAZ) with building footprints symbolized based on the land use associated with the footprint. Total employment in each TAZ is allocated to all buildings within the zone based on a combination of the land use weight (documented above) and the building footprint area.
Map of Disaggregated Employment Estimates by Building Footprint
The result of the aggregation process is a building footprint with a population and employment estimate associated with it. These are summarized to roadway segments based on whether or not they fall within the 1/4-mile euclidian buffer generated for each segment.
This map shows employment density within 1/4-mile buffers of each roadway segment.
This map shows population density within 1/4-mile buffers of each roadway segment.
This map shows activity unit density within 1/4-mile buffers of each roadway segment.